At the ASI:
We’re going to have to tax middle aged women having unprotected sex
And at Forbes, a response to Frances Coppolla:
For look at what happens. We have a rise in output: one more hole has been drilled (along with exciting amounts of medical care having hit the mains). The amount of labour that has been used is exactly the same whether a new drill was purchased to drill it, an old one was rescued from its slumber in that household or one is rented from its slumber elsewhere. However, by renting the drill we have not had to manufacture a new drill to make the hole (and the lovely emergency room visit etc). We have instead been able to use a piece of already extant capital to make the hole.
And thus so has the Solow Residual risen. Because we now have an increase in output (one more hole), using the same amount of labour we ever would have used, but without having to increase capital inputs into the economy. This is the very definition of a rise in the Solow Residual: thus the sharing economy creates economic growth.